<script setup>
import { User, Lock } from "@element-plus/icons-vue";
import { ref, onMounted } from "vue";
import { useRouter } from "vue-router";
import { ElMessage } from "element-plus";
import { registerAPI, loginAPI } from "@/api/login";
import { useUserStore } from "@/stores/useUserStore";
// 创建用户状态管理实例
const userStore = useUserStore();
// 创建路由实例
const router = useRouter();
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false);
//用于注册的数据模型
const registerData = ref({
  username: "",
  password: "",
  rePassword: "",
});
//自定义确认密码的校验函数
const rePasswordValid = (rule, value, callback) => {
  if (value == null || value === "") {
    return callback(new Error("请再次确认密码"));
  }
  if (registerData.value.password !== value) {
    return callback(new Error("两次输入密码不一致"));
  }
};
//用于注册的表单校验模型
const registerDataRules = ref({
  username: [
    { required: true, message: "请输入用户名", trigger: "blur" },
    { min: 5, max: 16, message: "用户名的长度必须为5~16位", trigger: "blur" },
  ],
  password: [
    { required: true, message: "请输入密码", trigger: "blur" },
    { min: 5, max: 16, message: "密码长度必须为5~16位", trigger: "blur" },
  ],
  rePassword: [{ validator: rePasswordValid, trigger: "blur" }],
});
//用于注册的事件函数
const register = async () => {
  const res = await registerAPI(registerData.value);
  if (res.code === 0) {
    userStore.clearUserInfo();
    isRegister.value = false;
    return ElMessage({ type: "success", message: "注册成功" });
  }
  return ElMessage({ type: "error", message: res.message });
};

//用于登录的事件函数
const login = async () => {
  const res = await loginAPI(registerData.value);
  if (res.code === 0) {
    userStore.setToken(res.data);
    if (userStore.userInfo.remember) {
      userStore.setUserInfo(registerData.value);
    } else {
      userStore.clearUserInfo();
    }
    router.replace("/");
    return ElMessage({ type: "success", message: "用户登录成功" });
  }
  return ElMessage({ type: "error", message: res.message });
};
// 进入页面加载 保存账户数据
const rememberMe = () => {
  registerData.value.username = userStore.userInfo.username;
  registerData.value.password = userStore.userInfo.password;
};
// 切换注册页面
const setIsRegister = () => {
  registerData.value.username = "";
  registerData.value.password = "";
  if (isRegister.value) {
    isRegister.value = false;
    rememberMe();
  } else {
    isRegister.value = true;
  }
};
onMounted(() => {
  userStore.getUserInfo();
  userStore.clearToken();
  rememberMe();
});
</script>

<template>
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册表单 -->
      <el-form
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
        :model="registerData"
        :rules="registerDataRules"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="registerData.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="registerData.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="rePassword">
          <el-input
            v-model="registerData.rePassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <!-- 注册按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="register">注册</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="setIsRegister">← 返回</el-link>
        </el-form-item>
      </el-form>
      <!-- 登录表单 -->
      <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="registerDataRules">
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="registerData.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="registerData.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox v-model="userStore.userInfo.remember" @input="userStore.setRemember">记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <!-- 登录按钮 -->
        <el-form-item>
          <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="setIsRegister">注册 →</el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    background: url("@/assets/logo2.png") no-repeat 60% center / 240px auto,
      url("@/assets/login_bg.jpg") no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
